Install GNU findutils

When preparing an installation script or a Makefile, it's interesting to test
against BSD and GNU find. The find utility is not shipped with coreutils,
but in a separate package.

References:

• https://www.gnu.org/software/findutils/
• https://www.freshports.org/misc/findutils

Test Plan: Install on WindRiver

Reviewed By: Duranzed

Differential Revision: https://devcentral.nasqueron.org/D4020